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Kernel functors for which the associated idempotent kernel functor is stable
Published online by Cambridge University Press: 18 May 2009
Extract
Let R be a ring with unity and let denote the category of unital right R-modules. A preradical γ of is a functor γ: → such that
(i) γ(M) ⊆ M for each R-module M,
(ii) for f:M → N, γ(f) is the restriction of f to γ(M).
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- Copyright © Glasgow Mathematical Journal Trust 1975